1. Department of Integrative Biology; University of Guelph; Guelph ON Canada N1G 2W1
2. S.O. Conte Anadromous Fish Research Laboratory; USGS-BRD-Leetown Science Center; Turners Falls MA 01376-0796 USA
3. Quantitative Fisheries Center; Department of Fisheries and Wildlife; Michigan State University; East Lansing MI 48824 USA
4. Great Lakes Laboratory for Fisheries and Aquatic Sciences; Fisheries and Oceans Canada; Burlington ON Canada L7R 4A6
5. Great Lakes Laboratory for Fisheries and Aquatic Sciences; Fisheries and Oceans Canada; Sault Ste. Marie ON Canada P6A 2E5
6. Pacific Biological Station; Fisheries and Oceans Canada; Nanaimo BC Canada V9T 6N7